How Do I Fix the Check Engine Light in My Audi?

My check engine light has been on in my Audi for a couple of days now. Are there any common problems or fixes that I can try before taking it to a mechanic? I'm concerned about the cost of repairs.

First, don't panic. The check engine light can come on for a variety of reasons. Some common issues in Audis include a loose gas cap, faulty oxygen sensor, or a bad catalytic converter.

You can try checking the gas cap to see if it's tightened properly. If that doesn't work, you can invest in an OBD II scanner to diagnose the specific issue. They're relatively inexpensive and easy to use.